I'm using dm-crypt + LUKS to encrypt 3 partitions of my disc.
Recently I started wondering how does it influence my system..
I know that due to the decryption the boot time is longer, but I would like to know:
How does this encryption influence my RAM?
Is that were the whole decrypted stuff is stored?
Is there a better way of encrypting whole filesystem when my device has little RAM?
I'm working with embedded devices so every MB counts.
I have read cryptsetup README and FAQ briefly but I could not find answer to my questions.
I do not want to dive deep into the documentation.